•Parts of a leaf
–Stoma: on the surface if the leaf, opens and closes like a pore allowing things in and out –Thylakoid: Structure inside chloroplasts that contains pigment (shaped like a coin) –Granum: Stacks of thylakoids –Stroma: The fluid that fills the chloroplast
•Pigment
–Pigments absorb certain colors of light and reflect or transmit the other colors –A plant is the color of the light that is reflected
–Photosynthesis begins with the absorption of light by the pigments in the thylakoids •Photosynthesis is the conversion of light energy into chemical energy stored in organic compounds.
•Location: Chloroplasts
•Two Steps
–Light Reactions •Reaction occurs in membrane of the thylakoid
•Light excites electrons in chlorophyll pigments (electrons go from low energy to high energy)
•Electrons travel to other molecules in membrane, losing energy along the way (This is called Electron Transport Chain, or ETC)
•Electron combine to make ADP + phosphate + electron ATP –Summary of Light Reactions:
•Needed: Light energy & H20
•Made: ATP •Waste: Oxygen
–Calvin Cycle
•produces glucose
•Occurs in stroma of chloroplast
•Uses ATP and H from Light reaction
•ATP + H + CO2 (from air) glucose (carbohydrate)
–Summary
•Light reaction
–Makes ATP from ADP
•Calvin Cycle
–Makes Glucose
•Parts of a leaf
–Stoma: on the surface if the leaf, opens and closes like a pore allowing things in and out
–Thylakoid: Structure inside chloroplasts that contains pigment (shaped like a coin)
–Granum: Stacks of thylakoids
–Stroma: The fluid that fills the chloroplast
•Pigment
–Pigments absorb certain colors of light and reflect or transmit the other colors
–A plant is the color of the light that is reflected
–Photosynthesis begins with the absorption of light by the pigments in the thylakoids
•Photosynthesis is the conversion of light energy into chemical energy stored in organic compounds.
•Location: Chloroplasts
•Two Steps
–Light Reactions
•Reaction occurs in membrane of the thylakoid
•Light excites electrons in chlorophyll pigments (electrons go from low energy to high energy)
•Electrons travel to other molecules in membrane, losing energy along the way (This is called Electron Transport Chain, or ETC)
•Electron combine to make ADP + phosphate + electron ATP
–Summary of Light Reactions:
•Needed: Light energy & H20
•Made: ATP
•Waste: Oxygen
–Calvin Cycle
•produces glucose
•Occurs in stroma of chloroplast
•Uses ATP and H from Light reaction
•ATP + H + CO2 (from air) glucose (carbohydrate)
–Summary
•Light reaction
–Makes ATP from ADP
•Calvin Cycle
–Makes Glucose